STS-130 countdown highlights

(countdown events are targeted for the preferred launch time of 10:39 CET on 7 February)

Friday, 5 February:

00:00 Countdown enters a 4-hour built-in hold at the T-27 hour mark04:00 Countdown resumes at the T-27 hour mark with PRSD loading of Endeavour’s three power-producing fuel cells with liquid oxygen and liquid hydrogen12:00 Countdown enters a 9-hour built-in hold at the T-19 hour mark; PRSD loading is complete and offloading of a portion of the cryogenics begins to meet the correct APM for Endeavour21:00 Countdown resumes at the T-19 hour mark

Sunday, 7 February:

01:00 NASA TV FUELING COVERAGE BEGINS; astronauts undergo final medical exams01:14 Countdown resumes at the T-6 hour mark with the fueling of Endeavour04:14 Countdown enters a 2-hour, 30-minute built-in hold at the T-3 hour mark; fueling is complete and goes into stable replenish04:30 The Ascent Team of flight controllers is on console in Mission Control, Houston05:30 NASA TV COVERAGE BEGINS FOR ENDEAVOUR’S LAUNCH06:19 The astronauts suit up for launch06:44 Countdown resumes at the T-3 hour mark06:49 The astronauts depart their crew quarters for Launch Pad 39-A07:19 The astronauts arrive at Launch Pad 39-A and begin to board Endeavour08:34 Endeavour’s hatch is closed and latched for launch09:24 Countdown enters a 10-minute built-in hold at the T-20 minute mark09:34 Countdown resumes at the T-20 minute mark09:45 Countdown enters a 40-minute built-in hold at the T-9 minute mark; the MMT conducts its final poll for a “go-no go” for the launch of Endeavour (this hold will be adjusted by about 5 additional minutes to become a 45-minute built-in hold designed to meet the preferred in-plane launch time of 10:39:44 CET)10:30 Countdown resumes at the T-9 minute mark10:34 APU start10:39:44 LAUNCH OF ENDEAVOUR ON THE STS-130 MISSION10:48:14 MECO